Shell script that detects changes to your public ip address and updates your iwantmyname.com nameservers.

iwantmyname.sh

#!/usr/local/bin/bash

# Q: What is this?
# A: It's a shell script that updates what ip address your iwantmyname.com domain resolves to.
#    I use it from cron.
# Q: What do I have to do?
# A: Add your username and password. Change the domain. Add it to your crontab.

set -e

user="youremail@yourdomain"
passwd="yourpasswd"

# try to read from previous run
if [ -f /tmp/wanip ]; then
    prevwanip=$(</tmp/wanip)
fi

# get wanip
wanip=$(dig whoami.akamai.net. @ns1-1.akamaitech.net. +short)
# store
echo $wanip > /tmp/wanip

if [ "$wanip" != "$prevwanip" ]; then
    echo "address changed from $prevwanip to $wanip"
    curl -s -u "$user:$passwd" "https://iwantmyname.com/basicauth/ddns?hostname=www.sm6wjm.net,sm6wjm.net"
    echo " sm6wjm.net"
    curl -s -u "$user:$passwd" "https://iwantmyname.com/basicauth/ddns?hostname=www.albinstigo.me,albinstigo.me"
    echo " albinstigo.me"
fi